How does AJAX contribute to form validation in modern web applications?
- Allows asynchronous communication with the server to validate form data.
- Enhances user experience by providing real-time validation feedback.
- Ensures server-side validation only.
- Improves security by encrypting form data during validation.
AJAX (Asynchronous JavaScript and XML) facilitates real-time communication with the server, allowing form validation without a page refresh. It enhances user experience and responsiveness by providing immediate feedback to users, reducing the need for server-side validation only. AJAX doesn't necessarily improve security; its focus is on enhancing user interaction and reducing latency.
To limit the results returned by a query, the Active Record Class method ________ is used.
- filter()
- limit()
- narrow()
- restrict()
The limit() method in the Active Record Class is used to restrict the number of records returned by a query. It takes two parameters - the number of records to return and the offset.
In CodeIgniter, debugging information about database queries can be displayed using ______.
- debug_queries()
- display_queries()
- log_queries()
- show_queries()
CodeIgniter allows you to debug database queries using the debug_queries() method. This function outputs information about the executed database queries, including the SQL statements, execution time, and other relevant details.
What is the best practice for managing layout and views in CodeIgniter for a large application?
- Place all views in the root folder for easy access.
- Use a modular structure with separate folders for controllers, models, and views.
- Use multiple controllers with duplicated views for simplicity.
- Utilize a single controller and model for all views.
The best practice for managing layout and views in a large CodeIgniter application is to adopt a modular structure, organizing controllers, models, and views in separate folders. This enhances maintainability and scalability.
How does tokenization enhance security in payment gateway integrations?
- Encrypts data during transmission
- Implements two-factor authentication
- Replaces sensitive data with unique tokens
- Uses biometric authentication
Tokenization enhances security by replacing sensitive payment data with unique tokens. These tokens are meaningless to attackers, reducing the risk of data breaches. Even if intercepted, tokens cannot be used to reconstruct the original payment information, providing an additional layer of protection.
In a modular CodeIgniter application, modules are typically organized within the ________ directory.
- application
- libraries
- modules
- third_party
In a modular CodeIgniter application, developers often organize modules within the 'modules' directory. This helps maintain a modular and organized structure, making it easier to manage and extend the application. The 'modules' directory holds the various components or modules of the application.
How does CodeIgniter's pagination library handle database queries for large datasets to improve efficiency?
- Applying JavaScript-based pagination on the client side.
- Loading the entire dataset into memory and then paginating locally.
- Using "limit" and "offset" clauses in the generated SQL queries.
- Utilizing server-side pagination through AJAX requests.
CodeIgniter's pagination library efficiently handles large datasets by incorporating "limit" and "offset" clauses in the generated SQL queries, allowing the database to retrieve only the necessary subset of records for each page.
When integrating email services into an application, what is the role of SMTP?
- Secure Mail Transfer Protocol
- Server Mail Transfer Protocol
- Service Mail Transfer Protocol
- Simple Mail Transfer Protocol
SMTP, or Simple Mail Transfer Protocol, is a communication protocol used to transmit emails over the internet. It handles the sending of emails between servers, ensuring reliable delivery. Understanding SMTP is crucial for implementing email functionality in CodeIgniter applications.
When a CodeIgniter application receives a JSON payload in a POST request, the first step in processing this data is to ________.
- Decode the JSON payload and retrieve data
- Extract data using $this->input->post()
- Use $this->input->json() to parse the payload
- Validate the JSON structure
In CodeIgniter, when dealing with JSON payloads in POST requests, the first step is decoding the payload. The correct method for this is $this->input->post(), which automatically decodes and retrieves the data from the JSON payload.
What is the primary purpose of creating custom libraries in CodeIgniter?
- To encapsulate and reuse specific functionality across the application
- To enhance database performance
- To improve routing mechanisms
- To store configuration settings
Custom libraries in CodeIgniter are created to encapsulate and reuse specific functionality across the application. This promotes code organization, maintainability, and reusability, contributing to a more efficient development process.